diff --git a/docker-compose.yml b/docker-compose.yml
index ca150ca..260e2ae 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -31,7 +31,7 @@ services:
       # Ollama — points to internal GPU server for embeddings + chat fallback
       OLLAMA_HOST: ${OLLAMA_HOST:-http://10.24.42.219:11434}
       OLLAMA_CHAT_HOST: ${OLLAMA_CHAT_HOST:-http://10.24.42.219:11434}
-      OLLAMA_CHAT_MODEL: ${OLLAMA_CHAT_MODEL:-mistral:latest}
+      OLLAMA_CHAT_MODEL: ${OLLAMA_CHAT_MODEL:-gemma4:latest}
       OLLAMA_EMBED_MODEL: ${OLLAMA_EMBED_MODEL:-nomic-embed-text}
       NODE_ENV: production
       AUTH_SECRET: ${AUTH_SECRET}